A remote power on / off control method and system integrated on a computer mainboard

Abstract

The present invention relates to the technical field of computer motherboard remote control, and specifically, to a remote power on / off control method and system integrated on a computer motherboard. The method comprises the following steps: receiving a restart instruction through a main control chip and outputting a high voltage signal, the high voltage signal reaches a transistor through a diode and a resistor and determines whether the transistor enters a conducting state. After the computer motherboard of the present invention performs filtering capacitance, the electric field strength of the computer motherboard when it is not shielded is calculated according to the magnetic field strength and the total noise frequency of the computer motherboard, and then the electromagnetic shielding strength coefficient is calculated. The computer motherboard is shielded according to the electromagnetic shielding strength coefficient. By accurately calculating the electromagnetic shielding strength coefficient, the electromagnetic interference of the computer motherboard can be effectively reduced, and the stability of the overall performance of the computer can be improved. At the same time, by reducing electromagnetic interference, the integrity of the computer motherboard signal under high-speed transmission can be ensured, and the transmission quality of the computer motherboard signal is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of computer mainboard remote control, and in particular to a remote power on / off control method and system integrated on a computer mainboard. Background Art

[0002] In modern computers, remote management and control is an important function. However, when performing a remote restart in standby mode, the main control chip of the computer motherboard needs to output a high voltage signal after receiving the restart command. When the main control chip of the computer motherboard outputs a high voltage signal to the base of the transistor, the voltage between the base and the emitter will exceed the turn-on voltage of the transistor, and the transistor will enter the on state. In the on state, the resistance between the collector and the emitter will become very small, and the current can pass smoothly. A low impedance path is formed between the collector and the emitter. The low impedance path means that the current can pass through the path more easily. When the current passes through the wire or circuit, a magnetic field is generated. If the current is large, the intensity of the magnetic field generated will also increase, thereby increasing the electromagnetic interference of the computer motherboard, resulting in a decrease in the stability of the overall performance of the computer. When the electromagnetic interference of the computer motherboard is increased, the integrity of the computer motherboard signal cannot be ensured under high-speed transmission conditions, thereby reducing the transmission quality of the computer motherboard signal. Therefore, we provide a remote power on / off control method and system integrated on the computer motherboard. Summary of the invention

[0003] The object of the present invention is to provide a remote power on / off control method and system integrated on a computer motherboard to solve the problems raised in the above background technology.

[0004] To achieve the above object, one of the objects of the present invention is to provide a remote power on / off control method integrated on a computer motherboard, comprising the following method steps:

[0005] S1. Receive the restart command through the main control chip and output a high voltage signal. The high voltage signal reaches the base of the transistor through the diode and the resistor. Record the base voltage and base current data at this time. Calculate the voltage difference according to the base voltage and judge whether the transistor is in the on state. When the transistor is in the on state, judge the state of the transistor according to the base current data.

[0006] Specific judgment situation:

[0007] Case ①: When the base current data is lower than the set base current range threshold, no collector current passes;

[0008] Case ②: When the base current data is within the set base current range threshold, the collector current flows between the collector and the emitter and is controlled by the base current;

[0009] Case ③: When the base current data exceeds the set base current range threshold, the collector current passes smoothly, and a low-impedance path is formed between the collector and the emitter;

[0010] S2. When a low impedance path is formed between the collector and the emitter, it is determined that there is an electromagnetic interference problem on the computer motherboard. The ripple current data and ripple voltage data of the measuring point of the computer motherboard are measured by an oscilloscope, and the capacitance value of the computer motherboard and the magnetic field strength when the computer motherboard is not shielded are calculated. Then, the computer motherboard is filtered according to the capacitance value of the computer motherboard, and the electromagnetic shielding strength coefficient is calculated using the magnetic field strength when the computer motherboard is not shielded, and shielding measures are taken;

[0011] S3. Use a low impedance path to pull down the high voltage signal, and the high voltage signal becomes a low voltage signal, thereby triggering the remote power on / off or restart control of the computer motherboard. Use a multimeter to detect the leakage current and power supply voltage of the computer motherboard during the set standby time to calculate the static power consumption of the computer motherboard. Use the static power consumption of the computer motherboard to determine whether to power off the circuit module of the computer motherboard. When the circuit module of the computer motherboard has high static power consumption, the circuit module of the computer motherboard is powered off.

[0012] As a further improvement of the technical solution, the S1 comprises the following steps:

[0013] S1.1. Receive the restart command through the main control chip. When the restart command is received, the main control chip outputs a high voltage signal. The main control chip inputs the high voltage signal into the diode. When the high voltage signal reaches the base of the transistor through the resistor, the base voltage data and base current, emitter voltage, and voltage data between the collector and the emitter are recorded. The voltage difference between the base and the emitter is calculated based on the base voltage and emitter voltage data. The voltage difference between the base and the emitter is then used to determine whether the transistor is in the on state. When the voltage difference between the base and the emitter is greater than the turn-on voltage threshold of the transistor, the transistor enters the on state.

[0014] S1.2. When the transistor enters the on state, the collector current data is calculated according to the base current data, and then the resistance between the collector and the emitter is calculated according to the voltage between the collector and the emitter and the collector current data. The resistance between the collector and the emitter and the base current data are used to determine the transistor state.

[0015] As a further improvement of the technical solution, the specific judgment of S1.2 in the step S1 is as follows:

[0016] Case ①: When the resistance between the collector and the emitter is greater than the set resistance threshold between the collector and the emitter, and the base current data is lower than the set base current range threshold, the transistor is determined to be in the cut-off state, and no collector current passes;

[0017] Case ②: When the resistance between the collector and the emitter is greater than the set resistance threshold between the collector and the emitter, and the base current data is within the set base current range threshold, it is determined that the transistor enters the amplification state, and the collector current flows between the collector and the emitter and is controlled by the base current;

[0018] Case ③: When the resistance between the collector and the emitter is less than the set resistance threshold between the collector and the emitter, and the base current data exceeds the set base current range threshold, it is determined that the transistor enters the saturation state, and the collector current passes smoothly, forming a low impedance path between the collector and the emitter.

[0019] As a further improvement of the technical solution, the S2 comprises the following steps:

[0020] S2.1. When the base current data exceeds the set base current range threshold value from S1.2, a low impedance path is formed between the collector and the emitter. It is determined that the base current data is large, which causes electromagnetic interference problems on the computer motherboard. The ripple current and ripple voltage data of the computer motherboard measurement point are measured using an oscilloscope, and then the computer motherboard power supply, digital signal, and environmental noise frequency are measured using a spectrum analyzer. The computer motherboard capacitance value is calculated based on the ripple current and ripple voltage data, power supply, digital signal, and environmental noise frequency, and then the computer motherboard is filtered according to the computer motherboard capacitance value.

[0021] S2.2. After knowing through S2.1 that the computer motherboard is filtered by capacitors, the magnetic field strength of the computer motherboard when it is not shielded is calculated based on the ripple current data. Then, the electric field strength of the computer motherboard when it is not shielded is calculated based on the magnetic field strength and total noise frequency of the computer motherboard. The electromagnetic shielding intensity coefficient is calculated using the magnetic field strength and electric field strength when the computer motherboard is not shielded. Shielding measures are taken for the computer motherboard based on the electromagnetic shielding intensity coefficient.

[0022] As a further improvement of the technical solution, the S2 is specifically a step of implementing the computer motherboard capacitance value in S2.1 as follows:

[0023] Step 1: Collect power supply noise frequency , digital signal noise frequency , ambient noise frequency Calculate the total noise frequency , the specific algorithm formula is:

[0024] ;

[0025] Among them, the total noise frequency The unit is (Hertz / Hz);

[0026] Step 2: According to the ripple current data , ripple voltage data The computer motherboard capacitance value is calculated by the total noise frequency to obtain the computer motherboard capacitance value. , the specific algorithm formula is:

[0027] ;

[0028] Among them, the computer motherboard capacitance value The unit is (farad / F), 2 refers to the constant.

[0029] As a further improvement of the technical solution, the calculation principle of the electromagnetic shielding strength coefficient in step S2.2 of S2 is as follows:

[0030] Collecting the magnetic field strength when the computer motherboard is not shielded The electric field strength when the computer motherboard is not shielded Calculate the electromagnetic shielding strength coefficient and obtain the electromagnetic shielding strength coefficient , the specific algorithm formula is:

[0031] ;

[0032] in, Refers to the electric field strength after historical shielding measures, Refers to the magnetic field strength after historical shielding measures.

[0033] As a further improvement of the technical solution, the S3 comprises the following steps:

[0034] S3. After knowing through S2.2 that shielding measures are taken on the computer mainboard, a low impedance path is used to pull down the high voltage signal, and the high voltage signal becomes a low voltage signal, thereby triggering the remote integrated switch module. The remote integrated switch module controls the remote power on / off or restart of the computer mainboard by integrating the computer mainboard IO chip and the changes in the current and voltage of the computer mainboard circuit. When the computer mainboard triggers remote power on or restart, the computer is in standby mode. The leakage current and power supply voltage of the computer mainboard during the set standby time are detected by a multimeter, and the static power consumption of the computer mainboard is calculated. The static power consumption of the computer mainboard is used to determine whether to power off the circuit module of the computer mainboard. When the static power consumption of the computer mainboard is greater than the set static power consumption threshold, it is determined that the circuit module of the computer mainboard has high static power consumption, and the circuit module of the computer mainboard is powered off.

[0035] The second object of the present invention is to provide a remote power on / off control system integrated on a computer motherboard, which is used to implement any of the control methods described above, and comprises a conduction judgment unit, a magnetic field capacitor unit and a remote control unit;

[0036] The conduction judgment unit obtains a high voltage signal and reaches the base of the transistor through a diode and a resistor, records the base voltage and base current data, calculates the voltage difference according to the base voltage, and judges whether the transistor enters the conduction state;

[0037] The magnetic field capacitance unit is used to receive a command for the transistor in the conduction judgment unit to enter the conduction state, determine that there is an electromagnetic interference problem on the computer mainboard, use an oscilloscope to measure the ripple current data and ripple voltage data of the computer mainboard measurement point, and calculate the computer mainboard capacitance value and the magnetic field strength when the computer mainboard is not shielded, and then filter the computer mainboard according to the computer mainboard capacitance value, calculate the electromagnetic shielding strength coefficient using the magnetic field strength when the computer mainboard is not shielded, and take shielding measures;

[0038] The remote control unit is used to receive commands from the computer mainboard in the magnetic field capacitor unit after shielding measures are taken, and use a low-impedance path to pull down the high voltage signal, thereby triggering remote power on / off or restart control of the computer mainboard, the leakage current and power supply voltage of the computer mainboard, and calculating the static power consumption of the computer mainboard, and using the static power consumption of the computer mainboard to determine whether to power off the computer mainboard circuit module.

[0039] Compared with the prior art, the present invention has the following beneficial effects:

[0040] 1. A remote power on / off control method and system integrated on a computer motherboard forms a low impedance path between the collector and the emitter. It is determined that the base current data is large, which causes electromagnetic interference problems on the computer motherboard. An oscilloscope is used to measure the ripple current and ripple voltage data of the computer motherboard measurement point, and then a spectrum analyzer is used to measure the computer motherboard power supply, digital signal, and environmental noise frequency. The computer motherboard capacitance value is calculated based on the ripple current and ripple voltage data, power supply, digital signal, and environmental noise frequency. Then, the computer motherboard is filtered according to the computer motherboard capacitance value. By accurately calculating the capacitance value, a suitable filter capacitor can be selected to effectively reduce the ripple voltage output by the power supply and improve the stability of the power supply. At the same time, selecting a suitable filter capacitor can reduce the noise in the digital signal and improve the signal integrity.

[0041] 2. A remote power on / off control method and system integrated on a computer motherboard. After the computer motherboard performs filtering capacitance, the magnetic field strength when the computer motherboard is not shielded is calculated based on the ripple current data. The electric field strength when the computer motherboard is not shielded is then calculated based on the magnetic field strength and total noise frequency of the computer motherboard. The electromagnetic shielding strength coefficient is calculated using the magnetic field strength and electric field strength when the computer motherboard is not shielded. Shielding measures are taken on the computer motherboard based on the electromagnetic shielding strength coefficient. By accurately calculating the electromagnetic shielding strength coefficient, the electromagnetic interference of the computer motherboard can be effectively reduced, and the stability of the overall performance of the computer can be improved. At the same time, by reducing electromagnetic interference, the integrity of the computer motherboard signal can be ensured under high-speed transmission conditions, thereby improving the transmission quality of the computer motherboard signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a flowchart of the overall steps of the present invention;

[0043] Figure 2 It is a unit block diagram of the present invention.

[0044] 1. Conductivity judgment unit; 2. Magnetic field capacitance unit; 3. Remote control unit. DETAILED DESCRIPTION

[0045] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] See also Figure 1 As shown, one of the purposes of this embodiment is to provide a remote power on / off control method integrated on a computer motherboard, comprising the following method steps:

[0047] S1. Receive the restart command through the main control chip and output a high voltage signal. The high voltage signal reaches the base of the transistor through the diode and the resistor. Record the base voltage and base current data at this time. Calculate the voltage difference according to the base voltage and judge whether the transistor is in the on state. When the transistor is in the on state, judge the state of the transistor according to the base current data.

[0048] The specific judgment of S1.2 in the step S1 is as follows:

[0049] Case ①: When the base current data is lower than the set base current range threshold, no collector current passes;

[0050] Case ②: When the base current data is within the set base current range threshold, the collector current flows between the collector and the emitter and is controlled by the base current;

[0051] Case ③: When the base current data exceeds the set base current range threshold, the collector current passes smoothly, and a low-impedance path is formed between the collector and the emitter;

[0052] S1.1. Receive the restart command through the main control chip. When the restart command is received, the main control chip outputs a high voltage signal. The main control chip inputs the high voltage signal into the diode to prevent reverse current or rectify the signal. When the high voltage signal passes through the diode and the resistor, it is used to limit the current and protect the base of the transistor from damage by overcurrent. When the high voltage signal passes through the resistor and reaches the base of the transistor, the base voltage data at this time is recorded. and base current data , emitter voltage data , the voltage data between collector and emitter , according to the base voltage data and emitter voltage data Calculate the voltage difference between the base and the emitter , and then use the voltage difference between the base and the emitter The turn-on voltage threshold of the transistor (the turn-on voltage threshold of the transistor has a value range of , the unit is volt / ) Determine whether the transistor is in the on state. When the voltage difference between the base and the emitter is When it is greater than the transistor's turn-on voltage threshold, the transistor enters the on state;

[0053] The basic structure of a triode includes a base, a collector, and an emitter;

[0054] S1.2, when the transistor enters the on state, according to the base current data Calculating collector current data ,in, Refers to the current amplification factor of the transistor, and then according to the voltage data between the collector and the emitter and collector current data Calculate the resistance between collector and emitter , using the resistor between the collector and emitter and base current data Determine the state of the transistor;

[0055] Specific judgment situation:

[0056] Case ①: When the resistance between collector and emitter is greater than the set resistance threshold between the collector and emitter, and the base current data When the base current is lower than the set base current range threshold, the transistor is determined to be in the cut-off state, so that the base-emitter junction is reverse biased, and the collector-base junction is also reverse biased, and no collector current passes;

[0057] Case ②: When the resistance between collector and emitter is greater than the set collector-emitter resistance threshold, and the base current data When the base current is within the set threshold, the transistor is judged to enter the amplification state, so that the base-emitter junction is forward biased and the collector-base junction is reverse biased, then the collector current flows between the collector and the emitter, but is controlled by the base current;

[0058] Case ③: When the resistance between collector and emitter is less than the set resistance threshold between the collector and emitter, and the base current data When the base current exceeds the set threshold value, the transistor is judged to enter the saturation state, so that the base-emitter junction and the collector-base junction are both forward biased, then the collector current passes smoothly, and a low impedance path is formed between the collector and the emitter;

[0059] S2. When a low impedance path is formed between the collector and the emitter, it is determined that there is an electromagnetic interference problem on the computer motherboard. The ripple current data and ripple voltage data of the measuring point of the computer motherboard are measured by an oscilloscope, and the capacitance value of the computer motherboard and the magnetic field strength when the computer motherboard is not shielded are calculated. Then, the computer motherboard is filtered according to the capacitance value of the computer motherboard, and the electromagnetic shielding strength coefficient is calculated using the magnetic field strength when the computer motherboard is not shielded, and shielding measures are taken;

[0060] S2.1, get the base current data from S1.2 When the base current exceeds the set threshold, a low impedance path is formed between the collector and the emitter to determine the base current data. The ripple current data of the computer motherboard is measured by an oscilloscope. and ripple voltage data Measure the power supply noise frequency of the computer motherboard using a spectrum analyzer , digital signal noise frequency , ambient noise frequency , according to the ripple current data , ripple voltage data , power supply noise frequency , digital signal noise frequency , ambient noise frequency Calculate the computer motherboard capacitance value and obtain the computer motherboard capacitance value , and then filter the computer motherboard according to the computer motherboard capacitance value. By accurately calculating the capacitance value, you can choose the appropriate filter capacitor, effectively reduce the ripple voltage of the power supply output, and improve the stability of the power supply. At the same time, choosing the appropriate filter capacitor can reduce the noise in the digital signal and improve the integrity of the signal;

[0061] The S2 is specifically the following steps for realizing the computer motherboard capacitance value in S2.1:

[0062] Step 1: Collect power supply noise frequency , digital signal noise frequency , ambient noise frequency Calculate the total noise frequency , the specific algorithm formula is:

[0063] ;

[0064] Among them, the total noise frequency The unit is (Hertz / Hz),

[0065] Step 2: According to the ripple current data , ripple voltage data The computer motherboard capacitance value is calculated by the total noise frequency to obtain the computer motherboard capacitance value. , the specific algorithm formula is:

[0066] ;

[0067] Among them, the computer motherboard capacitance value The unit is (farad / F), 2 refers to the constant. This formula is used to calculate the capacitance value of the computer motherboard. By accurately calculating the capacitance value, the appropriate filter capacitor can be selected to effectively reduce the ripple voltage of the power supply output and improve the stability of the power supply.

[0068] S2.2, after knowing through S2.1 that the computer motherboard is filtered by capacitor, according to the ripple current data Calculate the magnetic field strength when the computer motherboard is not shielded, and obtain the magnetic field strength when the computer motherboard is not shielded ,in, refers to the area of ​​the current loop, It refers to the distance between the measuring point and the current loop, and 2 refers to a constant. By calculating the magnetic field strength caused by the ripple current, we can fully understand the magnetic field distribution of the computer motherboard and its surrounding environment, and then according to the magnetic field strength of the computer motherboard and the total noise frequency Calculate the electric field strength when the computer motherboard is not shielded, and obtain the electric field strength when the computer motherboard is not shielded ,in, refers to the imaginary unit, Refers to magnetic permeability. By calculating the electric field strength when the computer motherboard is not shielded, the electromagnetic environment of the motherboard and its peripheral devices can be comprehensively evaluated, which is conducive to the formulation of more effective electromagnetic shielding measures. The electric field strength when the computer motherboard is not shielded Calculate the electromagnetic shielding strength coefficient and take shielding measures for the computer motherboard according to the electromagnetic shielding strength coefficient. By accurately calculating the electromagnetic shielding strength coefficient, the electromagnetic interference of the computer motherboard can be effectively reduced, and the stability of the overall performance of the computer can be improved. At the same time, by reducing electromagnetic interference, the integrity of the computer motherboard signal can be ensured under high-speed transmission conditions, thereby improving the transmission quality of the computer motherboard signal;

[0069] The specific implementation principle of the calculation of the electromagnetic shielding strength coefficient in step S2.2 is as follows:

[0070] Collecting the magnetic field strength when the computer motherboard is not shielded The electric field strength when the computer motherboard is not shielded Calculate the electromagnetic shielding strength coefficient and obtain the electromagnetic shielding strength coefficient , the specific algorithm formula is:

[0071] ;

[0072] in, Refers to the electric field strength after historical shielding measures, Refers to the magnetic field strength after historical shielding measures. This formula is used to calculate the electromagnetic shielding strength coefficient. By accurately calculating the electromagnetic shielding strength coefficient, the electromagnetic interference of the computer motherboard to the external environment can be effectively reduced, and the electromagnetic compatibility of the overall system can be improved;

[0073] S3, using a low impedance path to pull down the high voltage signal, so that the high voltage signal becomes a low voltage signal, thereby triggering the remote power on / off or restart control of the computer motherboard, detecting the leakage current and power supply voltage of the computer motherboard during the set standby time by a multimeter to calculate the static power consumption of the computer motherboard, using the static power consumption of the computer motherboard to determine whether to power off the circuit module of the computer motherboard, and when the circuit module of the computer motherboard has high static power consumption, the circuit module of the computer motherboard is powered off;

[0074] S3. After knowing through S2.2 that the computer motherboard has been shielded, a low impedance path is used to pull down the high voltage signal, and the high voltage signal becomes a low voltage signal, thereby triggering the remote integrated switch module. The remote integrated switch module controls the remote power on / off or restart of the computer motherboard by integrating the computer motherboard IO chip and the current and voltage changes of the computer motherboard circuit. When the computer motherboard triggers the remote power on or restart, the computer is in standby mode, and the leakage current of the computer motherboard during the set standby time is detected by a multimeter. (Leakage current refers to the small current that still exists in the computer motherboard circuit even when the circuit module of the computer motherboard is not working) and the power supply voltage , according to the leakage current of the computer motherboard and supply voltage Calculate the static power consumption of the computer motherboard and obtain the static power consumption of the computer motherboard By knowing the static power consumption of the computer motherboard, we can accurately quantify the static power consumption of the computer motherboard in standby mode, and understand the actual power consumption of the circuit modules of the computer motherboard when they are not active. The static power consumption threshold is used to determine whether to power off the computer motherboard circuit module. When the static power consumption is greater than the set threshold value, it is determined that the computer is in standby mode, and the circuit module of the computer motherboard has high static power consumption, and the circuit module of the computer motherboard is powered off. By powering off the circuit module of the computer motherboard, the power consumption of the computer in standby mode for a long time can be reduced, and the overall energy consumption of the computer can be reduced. At the same time, necessary components are powered on, and the remaining components are powered off, thereby improving the utilization efficiency of the computer motherboard resources;

[0075] The circuit modules of the computer motherboard include CPU core, GPU core, peripheral interface (keyboard controller, mouse controller, display controller), memory, cache, clock generator, and I / O (keyboard controller, mouse controller, display controller) circuit modules.

[0076] See also Figure 2 As shown, the second object of the present invention is to provide a remote power on / off control system integrated on a computer motherboard, which is used to implement the above control method, including a conduction judgment unit 1, a magnetic field capacitor unit 2 and a remote control unit 3;

[0077] The conduction judgment unit 1 obtains a high voltage signal and reaches the base of the transistor through a diode and a resistor, records the base voltage and base current data, calculates the voltage difference according to the base voltage and judges whether the transistor enters the conduction state;

[0078] The magnetic field capacitance unit 2 is used to receive the command of the transistor in the conduction judgment unit 1 to enter the conduction state, determine that there is an electromagnetic interference problem on the computer mainboard, use an oscilloscope to measure the ripple current data and ripple voltage data of the computer mainboard measurement point, and calculate the computer mainboard capacitance value and the magnetic field strength when the computer mainboard is not shielded, and then filter the computer mainboard according to the computer mainboard capacitance value, calculate the electromagnetic shielding strength coefficient using the magnetic field strength when the computer mainboard is not shielded, and take shielding measures;

[0079] The remote control unit 3 is used to receive commands from the computer mainboard in the magnetic field capacitor unit 2 after shielding measures are taken, and use a low-impedance path to pull down the high voltage signal, thereby triggering the remote power on / off or restart control of the computer mainboard, the leakage current and power supply voltage of the computer mainboard, and the calculation of the static power consumption of the computer mainboard, and use the static power consumption of the computer mainboard to determine whether to power off the computer mainboard circuit module.

[0080] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A remote power on / off control method integrated on a computer motherboard, characterized in that: The method comprises the following steps: S1. Receive the restart command through the main control chip and output a high voltage signal. The high voltage signal reaches the base of the transistor through the diode and the resistor. Record the base voltage and base current data at this time. Calculate the voltage difference according to the base voltage and judge whether the transistor is in the on state. When the transistor is in the on state, judge the state of the transistor according to the base current data. Specific judgment situation: Case ①: When the base current data is lower than the set base current range threshold, no collector current passes; Case ②: When the base current data is within the set base current range threshold, the collector current flows between the collector and the emitter and is controlled by the base current; Case ③: When the base current data exceeds the set base current range threshold, the collector current passes smoothly, and a low-impedance path is formed between the collector and the emitter; S2. When a low impedance path is formed between the collector and the emitter, it is determined that there is an electromagnetic interference problem on the computer motherboard. The ripple current data and ripple voltage data of the measuring point of the computer motherboard are measured by an oscilloscope, and the capacitance value of the computer motherboard and the magnetic field strength when the computer motherboard is not shielded are calculated. Then, the computer motherboard is filtered according to the capacitance value of the computer motherboard, and the electromagnetic shielding strength coefficient is calculated using the magnetic field strength when the computer motherboard is not shielded, and shielding measures are taken; The S2 specifically includes the following steps: S2.

1. When the base current data exceeds the set base current range threshold value from S1.2, a low impedance path is formed between the collector and the emitter. It is determined that the base current data is large, which causes electromagnetic interference problems on the computer motherboard. The ripple current and ripple voltage data of the computer motherboard measurement point are measured using an oscilloscope, and then the computer motherboard power supply, digital signal, and environmental noise frequency are measured using a spectrum analyzer. The computer motherboard capacitance value is calculated based on the ripple current and ripple voltage data, power supply, digital signal, and environmental noise frequency, and then the computer motherboard is filtered according to the computer motherboard capacitance value. Steps to implement the computer motherboard capacitance value: Step 1: Collect power supply noise frequency , digital signal noise frequency , ambient noise frequency Calculate the total noise frequency , the specific algorithm formula is: ； Among them, the total noise frequency The unit is Hertz; Step 2: According to the ripple current data , ripple voltage data The computer motherboard capacitance value is calculated by the total noise frequency to obtain the computer motherboard capacitance value. , the specific algorithm formula is: ； Among them, the computer motherboard capacitance value The unit is Farad, 2 refers to the constant; S2.2, after knowing through S2.1 that the computer motherboard is filtered by capacitor, according to the ripple current data Calculate the magnetic field strength when the computer motherboard is not shielded, and obtain the magnetic field strength when the computer motherboard is not shielded ,in, refers to the area of ​​the current loop, It refers to the distance between the measuring point and the current loop, 2 refers to the constant, and then according to the magnetic field strength of the computer motherboard and the total noise frequency Calculate the electric field strength when the computer motherboard is not shielded, and obtain the electric field strength when the computer motherboard is not shielded ,in, refers to the imaginary unit, Refers to magnetic permeability, which uses the magnetic field strength and electric field strength when the computer motherboard is not shielded to calculate the electromagnetic shielding strength coefficient, and shielding measures are taken for the computer motherboard according to the electromagnetic shielding strength coefficient; Principle of calculating electromagnetic shielding strength coefficient: Collecting the magnetic field strength when the computer motherboard is not shielded The electric field strength when the computer motherboard is not shielded Calculate the electromagnetic shielding strength coefficient and obtain the electromagnetic shielding strength coefficient , the specific algorithm formula is: ； in, Refers to the electric field strength after historical shielding measures, Refers to the magnetic field strength after historical shielding measures; S3. Use a low impedance path to pull down the high voltage signal, and the high voltage signal becomes a low voltage signal, thereby triggering the remote power on / off or restart control of the computer motherboard. Use a multimeter to detect the leakage current and power supply voltage of the computer motherboard during the set standby time to calculate the static power consumption of the computer motherboard. Use the static power consumption of the computer motherboard to determine whether to power off the circuit module of the computer motherboard. When the circuit module of the computer motherboard has high static power consumption, the circuit module of the computer motherboard is powered off.

2. A remote power on / off control method integrated on a computer motherboard according to claim 1, characterized in that: The S1 specifically comprises the following steps: S1.

1. Receive the restart command through the main control chip. When the restart command is received, the main control chip outputs a high voltage signal. The main control chip inputs the high voltage signal into the diode. When the high voltage signal reaches the base of the transistor through the resistor, the base voltage data and base current, emitter voltage, and voltage data between the collector and the emitter are recorded. The voltage difference between the base and the emitter is calculated based on the base voltage and emitter voltage data. The voltage difference between the base and the emitter is then used to determine whether the transistor is in the on state. When the voltage difference between the base and the emitter is greater than the turn-on voltage threshold of the transistor, the transistor enters the on state. S1.

2. When the transistor enters the on state, the collector current data is calculated according to the base current data, and then the resistance between the collector and the emitter is calculated according to the voltage between the collector and the emitter and the collector current data. The resistance between the collector and the emitter and the base current data are used to determine the transistor state.

3. The remote power on / off control method integrated on a computer motherboard according to claim 2, characterized in that: The specific judgment of S1.2 in the step S1 is as follows: Case ①: When the resistance between the collector and the emitter is greater than the set resistance threshold between the collector and the emitter, and the base current data is lower than the set base current range threshold, the transistor is determined to be in the cut-off state, and no collector current passes; Case ②: When the resistance between the collector and the emitter is greater than the set resistance threshold between the collector and the emitter, and the base current data is within the set base current range threshold, it is determined that the transistor enters the amplification state, and the collector current flows between the collector and the emitter and is controlled by the base current; Case ③: When the resistance between the collector and the emitter is less than the set resistance threshold between the collector and the emitter, and the base current data exceeds the set base current range threshold, it is determined that the transistor enters the saturation state, and the collector current passes smoothly, forming a low impedance path between the collector and the emitter.

4. The remote power on / off control method integrated on a computer motherboard according to claim 3, characterized in that: The S3 specifically comprises the following steps: S3. After knowing through S2.2 that shielding measures are taken on the computer mainboard, a low impedance path is used to pull down the high voltage signal, and the high voltage signal becomes a low voltage signal, thereby triggering the remote integrated switch module. The remote integrated switch module controls the remote power on / off or restart of the computer mainboard by integrating the computer mainboard IO chip and the changes in the current and voltage of the computer mainboard circuit. When the computer mainboard triggers remote power on or restart, the computer is in standby mode. The leakage current and power supply voltage of the computer mainboard during the set standby time are detected by a multimeter, and the static power consumption of the computer mainboard is calculated. The static power consumption of the computer mainboard is used to determine whether to power off the circuit module of the computer mainboard. When the static power consumption of the computer mainboard is greater than the set static power consumption threshold, it is determined that the circuit module of the computer mainboard has high static power consumption, and the circuit module of the computer mainboard is powered off.

5. A remote power on / off control system integrated on a computer motherboard, used to implement the control method according to any one of claims 1 to 4, characterized in that: It comprises a conduction judgment unit (1), a magnetic field capacitance unit (2) and a remote control unit (3); The conduction judgment unit (1) obtains a high voltage signal and reaches the base of the transistor through a diode and a resistor, records the base voltage and base current data, calculates the voltage difference according to the base voltage and judges whether the transistor enters the conduction state; The magnetic field capacitance unit (2) is used to receive a command from the conduction judgment unit (1) that the triode enters the conduction state, determine whether there is an electromagnetic interference problem on the computer mainboard, use an oscilloscope to measure the ripple current data and ripple voltage data of the computer mainboard measurement point and calculate the computer mainboard capacitance value and the magnetic field strength when the computer mainboard is not shielded, then filter the computer mainboard according to the computer mainboard capacitance value, calculate the electromagnetic shielding strength coefficient using the magnetic field strength when the computer mainboard is not shielded, and take shielding measures; The remote control unit (3) is used to receive a command from the computer mainboard in the magnetic field capacitor unit (2) after shielding measures are taken, and to use a low impedance path to pull down a high voltage signal, thereby triggering remote power on / off or restart control of the computer mainboard, and to calculate the leakage current and power supply voltage of the computer mainboard and the static power consumption of the computer mainboard, and to use the static power consumption of the computer mainboard to determine whether to power off the circuit module of the computer mainboard.

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